Crater Lake is a pretty special lake: It was formed purely from rainwater into a crater over the last 7000 years. It is still the clearest lake in the world.
With fish, however, came a whole ecosystem. When fish die they decompose. I don't know the details, but the whole process is leading the lake to be less and less clear.
(Some people also consider it the bluest lake in the world, but that title tends to be disputed).
Just checked again and it seems you need to release any bull trout caught there, as they are now endangered. Pity.
I've never understood how we could put so much bloat behind text and a few images that a modern computer running tens to hundreds of billions of operations per second, with tens to hundreds of billions of bytes of RAM gets outpaced by a 90's computer displaying the same level of multimedia. If a web page doesn't run as well as Encarta '95, it has failed, in my opinion.
